<?php
/******************************************************************************
 Prevent direct access
 ******************************************************************************/
if (!defined('CSS_CACHEER')) { header('Location:/'); }

$plugin_class = 'ConstantsPlugin';
class ConstantsPlugin extends CacheerPlugin
{
	function pre_process($css)
	{
		$constants = array();
		if (preg_match_all('#@constants\s*\{\s*([^\}]+)\s*\}\s*#i', $css, $matches))
		{
			foreach ($matches[0] as $i => $constant)
			{
				$css = str_replace($constant, '', $css);
				preg_match_all('#([_a-z0-9]+)\s*:\s*([^;]+);#i', $matches[1][$i], $vars);
				foreach ($vars[1] as $var => $name)
				{
					$constants["const($name)"] = $vars[2][$var];
				}
			}
		}

		if (!empty($constants))
		{
			$css = str_replace(array_keys($constants), array_values($constants), $css);
		}
		
		return $css;
	}
}